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WELLINGTON MANAGEMENT GROUP LLP: MRK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WELLINGTON MANAGEMENT GROUP LLP on MRK, newest first. How the timeline and the estimate are built.

WELLINGTON MANAGEMENT GROUP LLP held 86,249,283 MRK shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 86,249,283 shares
    Change vs previous 13F +1,934,312 shares

    1.91% of the 13F portfolio, value $11,083,032,867.

    13F-HR 0000902219-26-000311 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 84,314,971 shares
    Change vs previous 13F -2,120,487 shares

    1.89% of the 13F portfolio, value $10,142,247,862.

    13F-HR 0000902219-26-000209 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 86,435,458 shares
    Change vs previous 13F +11,156,354 shares

    1.59% of the 13F portfolio, value $9,098,196,310.

    13F-HR 0000902219-26-000103 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 75,279,104 shares
    Change vs previous 13F -1,577,388 shares

    1.11% of the 13F portfolio, value $6,318,175,198.

    13F-HR 0000902219-25-000462 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 76,856,492 shares
    Change vs previous 13F -4,813,159 shares

    1.1% of the 13F portfolio, value $6,083,959,907.

    13F-HR 0000902219-25-000356 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 81,669,651 shares
    Change vs previous 13F +927,621 shares

    1.41% of the 13F portfolio, value $7,330,667,874.

    13F-HR 0000902219-25-000242 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F/A 80,742,030 shares
    Change vs previous 13F +4,932,647 shares

    1.47% of the 13F portfolio, value $8,032,217,145.

    13F-HR 0000902219-25-000131 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 75,809,383 shares
    Change vs previous 13F not available

    1.51% of the 13F portfolio, value $8,608,913,533.

    13F-HR 0000902219-24-000498 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).